Influence of Different Steel Alloys on the Machining Results in Ultrasonic Assisted Diamond Turning

Abstract:

This publication focuses on the ultra precision manufacturing of hardened steel parts with single crystal diamond tools for optical applications such as injection moulding. Nowadays optical steel moulds are nickel plated, in order to be able to machine the surface with single crystalline diamond tools. One technology that has proven its potential for replacing this procedure is the ultrasonic assisted diamond turning technique. This process allows direct machining of hardened steel with single crystal diamond tools, which is conventionally not possible due to the high tool wear. The ultrasonic assisted diamond turning process is applied in order to machine different steel alloys that are conventionally used for mould manufacturing in injection moulding. The goal is to analyze the influence of the steel alloy and the material microstructure on the machining results. The presented analysis show the capabilities of this new technology and opens the door for it to compete with established manufacturing processes, such as the manufacturing of nickel plated mold inserts.

• Periodical: Key Engineering Materials (Volumes 523-524)
• Pages: 203-208
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.523-524.203
• Online since: November 2012
• Authors: Benjamin Bulla, Fritz Klocke, Olaf Dambon, Martin Hünten
• Keywords: Diamond Turning, Mould Manufacturing, Steel Machining, Ultra-Precision Manufacturing, Ultrasonic Assisted Machining

References

[1] Product data sheet PREMIUM 1.2767 ESU ABRAMS Premium Stahl, (2011)

[2] Product data sheet Böhler M390 Microclean Böhler Edelstahl GmbH & Co KG, (2007)

[3] Materials for plastic forming, Böhler-Uddeholm Deutschland GmbH, Division Uddeholm, (2011)

[4] Moriwaki, T.; Shamoto, E.: Ultraprecision Diamond Turning of Stainless Steel by Applying Ultrasonic Vibration, Annals of the CIRP Volume 40/1/1991, Page 559-562

DOI: 10.1016/s0007-8506(07)62053-8

[5] Klocke, F.; Dambon, O.; Bulla, B. Direct diamond turning of aspheric steel moulds in ultra precise accuracy, 25th ASPE Annual Meeting, Atlanta, USA (2010)

[6] S. Shimada, H. Tanaka, M. Higuchi, T. Yamaguchi, S. Honda and K. Obata, Thermo-Chemical Wear Mechanism of Diamond Tool in Machining of Ferrous Metals; Annals of the CIRP, Vol. 53, Issue 1, Page 57-60, (2004)

DOI: 10.1016/s0007-8506(07)60644-1

[7] Brehl, D.E., Dow, T.A., Review of vibration-assisted machining, Precision Engineering, Volume 32, Issue 3, Pages 153-172, July (2008)

DOI: 10.1016/j.precisioneng.2007.08.003